Cost of incandescent $1.50 eff = 12% power consumption = 60 W hours = 1200LED cost $2 eff = ? Consumption = 8W hours = 42000Not sure what steps as they are all linked

How much does it cost to run each kind of bulb for 42,000 hours (almost 5 years)? We will solve this is pieces. 1. How many incandescent bulbs will you need for 42,000 hours and how much will that cost? 42000- 35 bulbs 35 x 1.50 = $52.50 1200 Calculate how much the electric company will charge you to run an incandescent bulb for 42000 hours. Electric companies keep track of usage by counting how many kW*hours you use, which is just the product of power (J/s) and time. Assume that the cost of electricity is $0.14/(kWatt*hour). (This calculation is analogous to finding out how much you spend on coffee if you buy 5 cups/day at $2/cup for a month. We don't have a formula for it, but you can use common sense and units to figure out the formula.) O.14 x42000 = 98000 0.06 What is the total cost of running incandescent bulbs for 42,000 hours? Now repeat the same three steps for the LED by finding the cost of bulbs, cost of power, and total cost. Ibulb = 42000 hrs Cost = $2